dbRotateImage doesn't work ! - GameCreators Forum

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JulienCpp

16

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Joined: 13th May 2008

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Posted: 25th Jun 2008 12:52

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try it !

+ Code Snippet

#include "DarkGDK.h"
#define M_PI       3.14159265358979323846

void DarkGDK ( void )
{
	dbSyncOn   ( );
	dbSyncRate ( 60 );

	::dbBackdropColor(::dbRgb(255, 255, 255)); // backdrop in white
	::dbBackdropOn();
	::dbSync();

	// create the sprite and his image
	::dbInk(::dbRgb(255, 0, 0), ::dbRgb(255, 0, 0));
	::dbBox(0, 0, 50, 10);
	::dbGetImage(1, 0, 0, 50, 10, 1);
	::dbSprite(1, 50, 50, 1);

	float a = 0.0f;
	while ( LoopGDK ( ) )
	{
		dbRotateImage(1, (int) (180.0f*a / M_PI)); // doesn't work?
		// update the sprite 1
		dbSprite(1, 50, 50, 1);
		// new angle
		a += 0.05f; // in radians
		// update the screen
		dbSync ( );
	}
	return;
}

If there is an error in this code, tell me but on my screen there is just a rectangle which doesn't rotate.
Do you get the solution ? Please!

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Mahoney

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Joined: 14th Apr 2008

Location: The Interwebs

Posted: 25th Jun 2008 18:04

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What's with the ::?

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JulienCpp

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Joined: 13th May 2008

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Posted: 25th Jun 2008 18:07

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It's just an operator, access to the global namespace

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dark coder

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Joined: 6th Oct 2002

Location: Japan

Posted: 25th Jun 2008 18:11 Edited at: 25th Jun 2008 18:11

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Maybe he hasn't discovered Ctrl + space yet? Also, I didn't run the code because dbGetImage() kept breaking for me and I'm too lazy to find an image. However I can guess that it doesn't work because sprites aren't images(in the GDK sense), rotating an image, pasting it and what not will in no way affect the sprite, short of deleting it. If you want your sprite to rotate, then rotate that instead, if not, use dbPasteImage().

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JulienCpp

16

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Joined: 13th May 2008

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Posted: 25th Jun 2008 18:42

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no i didn't know Ctrl+Space

.
More simply,
even if i use dbPasteImage, it doesn't work

+ Code Snippet

#include "DarkGDK.h"
#define M_PI       3.14159265358979323846

void DarkGDK ( void )
{
	dbSyncOn   ( );
	dbSyncRate ( 60 );

	dbBackdropColor(dbRgb(255, 255, 255)); // backdrop in white
	dbBackdropOn();
	dbSync();

	// create the sprite and his image
	dbInk(dbRgb(255, 0, 0), dbRgb(255, 0, 0));
	dbBox(0, 0, 50, 10);
	dbGetImage(1, 0, 0, 50, 10, 1);
	float a = 0.0f; // angle
	while ( LoopGDK ( ) )
	{
		dbRotateImage(1, (int) (180.0f*a / M_PI));
		dbPasteImage(1, 10, 10);
		a += 0.5f; 
		dbSync ( );
	}
	return;
}

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JulienCpp

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Joined: 13th May 2008

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Posted: 26th Jun 2008 16:12

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In fact, There had a simple solution : use dbOffsetSprite and then dbRotateSprite
but i continue to say that dbRotateImage doesn't work...

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Dark GDK / dbRotateImage doesn't work !